The purpose of this study is to test experimental human immunodeficiency virus (HIV) vaccines
that use an adenovirus vector. The adenovirus vector may help the vaccines stimulate an
immune response. Researchers want to see how the immune system will respond to these vaccines
as well as if they are safe to give to people. Participants cannot get HIV from these
vaccines. However, researchers also want to see if the vaccine's adenovirus is contagious.
Adenoviruses cause cold symptoms or mild eye infections, therefore household and intimate
contacts will be asked to participate as well.